About the option to sort through actors

I currently have 121 movies in my XBMC library with 642 actors registrered at themoviedb.org - if themoviedb took only three actors / film this might be an useful option but since this view is spammed with small time actors that is in one or two movies at the most I will never use this feature.

My simple request is the possibility to switch the actors option to director or writer in the settings of the app. Something that would be far more useful!